You can tap it safely. The AMS is a great rig and well worth the effort if you can tolerate that heavy draw while bow fishing. Take it to an archery shop. They will have to know what they are doing. It is common to tap recurve bows for competitive shooting so that counter weights can be added just like with the compound bows.

I kind of like buckhunter's advice. Mainly because I prefer the 40lb weight range for bow fishing. I use a three finger draw for getting off quick snap shots and that is much tougher with a 60 pound draw weight. When your fingers are wet, a 40 pound draw is much nicer. You can probably buy a cheap used bow for what it would cost you to tap the recurve. Whether it is important for you to retain recurve value is up to you. The good thing about bow fishing with the 60 pound recurve though is that it is great practice for deer hunting. Once you get to the point of nailing a fleeing carp from 20 yards, a standing deer will look like a BIG target.